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Schema Validator

Paste structured JSON-LD schema blocks to validate structure, types, and properties.

Structured Data

JSON-LD structured data is a standardized format for providing information about a page and classifying the page content (e.g. FAQ, How-To, Article, Product).

⚡ Offline Syntax

Verify context declarations, missing colons, invalid nesting structures, required properties, and correct formatting rules directly on your local browser engine.

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💡 What is the Schema Validator?

The Schema Validator on Toolslove.online is a free web-based application designed to validate your json-ld schema markup online check syntax, context, type validation, faqpage hierarchy, and breadcrumblist parameters client-side. instantly. Built using modern, client-side HTML5 and JavaScript technologies, all operations and inputs are processed locally in your browser. This ensures that your private data is never sent to any server, offering absolute privacy, extreme speed, and full offline accessibility.

🛠️ How to Use the Schema Validator

01

Input your text, values, or file into the custom entry fields at the top of this page.

02

Adjust standard parameters, target outputs, or formats to match your specific requirements.

03

Click the action button. The local browser compilation processes your output instantaneously.

04

Download or copy the generated output directly. No email address or subscription required.

🌟 Key Benefits

  • No Server Uploads: Absolute privacy, compliance, and local web encryption.
  • High-Speed Execution: Zero network request latency.
  • Responsive Styling: Optimally scaled layout for iOS, Android, and Desktop.
  • Free API Alternative: Replaces paid subscription software tools.

💼 Common Use Cases

  • Digital Agencies: Secure bulk parsing and testing capabilities.
  • Students & Teachers: Practical calculators and fast utility generators.
  • SEO Specialists: Analyzing density and creating meta tags instantly.
  • Content Creators: Polishing tags and generating captions on the fly.
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❓ Frequently Asked Questions

Q: How does the Schema Validator work? ▼

Q: Is my personal data saved when using Schema Validator? ▼

Q: Can I use this tool offline? ▼

Q: Are there limits to how many times I can use Schema Validator? ▼

Q: Does this tool work on mobile devices? ▼

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🔗 Explore Related Tools

🚀 Faq Schema Generatorerator 🚀 Keyword Density Checker 🚀 Meta Description Generator 🚀 Meta Tag Analyzer
⭐️ Enjoying Schema Validator?
')) { cleanJson = schemaText.replace(/]*>/, '').replace(/<\/script>/, '').trim(); recs.push({ status: 'pass', text: 'Detected HTML script wrapping tags.', details: 'Extracted raw JSON code block successfully.' }); } const json = JSON.parse(cleanJson); recs.push({ status: 'pass', text: 'JSON syntax is valid.', details: 'No parsing syntax errors detected.' }); // Context Check const context = json['@context']; if (!context) { recs.push({ status: 'fail', text: 'Missing "@context" declaration.', details: 'Structured schemas must declare "@context": "https://schema.org" at the root level.' }); isValid = false; } else if (!context.includes('schema.org')) { recs.push({ status: 'warning', text: 'Non-standard context defined.', details: `Expected "https://schema.org", received "${context}".` }); } else { recs.push({ status: 'pass', text: 'Valid schema context declared.', details: context }); } // Type Check type = json['@type'] || 'N/A'; if (type === 'N/A') { recs.push({ status: 'fail', text: 'Missing "@type" declaration.', details: 'Identify the entity class (e.g., FAQPage, WebApplication).' }); isValid = false; } else { recs.push({ status: 'pass', text: `Primary entity class type parsed: "${type}".`, details: 'Valid root type declaration.' }); } // Specific Schema Audits if (type === 'FAQPage') { const entities = json.mainEntity; if (!entities) { recs.push({ status: 'fail', text: 'Missing "mainEntity" property.', details: 'FAQPage requires a "mainEntity" array referencing Question types.' }); } else if (!Array.isArray(entities)) { recs.push({ status: 'warning', text: '"mainEntity" is not formatted as an array.', details: 'Standard FAQ structures declare lists of questions inside an array.' }); } else { recs.push({ status: 'pass', text: `Detected "mainEntity" array with ${entities.length} items.`, details: 'Beginning Question/Answer validations.' }); let qErrs = 0; entities.forEach((e, idx) => { if (e['@type'] !== 'Question') qErrs++; if (!e.name || !e.acceptedAnswer || e.acceptedAnswer['@type'] !== 'Answer' || !e.acceptedAnswer.text) { qErrs++; } }); if (qErrs > 0) { recs.push({ status: 'fail', text: `Detected ${qErrs} invalid Question/Answer items.`, details: 'Each FAQ item must have type: "Question", a non-empty "name", and an "acceptedAnswer" of type: "Answer" containing a "text" string.' }); } else { recs.push({ status: 'pass', text: 'All FAQ Question & Answer mappings are valid.', details: '100% compliant with Rich Snippets guidelines.' }); } } } else if (type === 'HowTo') { const steps = json.step; if (!steps || !Array.isArray(steps) || steps.length === 0) { recs.push({ status: 'fail', text: 'Missing or empty "step" array.', details: 'HowTo schemas require a step list denoting positioning and instructions.' }); } else { recs.push({ status: 'pass', text: `HowTo schema contains ${steps.length} steps.`, details: 'Valid step count.' }); } } else if (type === 'BreadcrumbList') { const items = json.itemListElement; if (!items || !Array.isArray(items) || items.length === 0) { recs.push({ status: 'fail', text: 'Missing or empty "itemListElement" array.', details: 'Breadcrumbs must declare list elements.' }); } else { recs.push({ status: 'pass', text: `BreadcrumbList has ${items.length} navigation tiers.`, details: 'Valid hierarchy.' }); } } } catch (err) { recs.push({ status: 'fail', text: 'JSON Syntactic Parsing Error.', details: err.message }); isValid = false; } // Display document.getElementById('validationStatus').innerText = isValid ? 'VALID ✅' : 'INVALID ❌'; document.getElementById('validationStatus').style.color = isValid ? '#00ff88' : '#ff4757'; document.getElementById('schemaTypeBox').innerText = type; document.getElementById('recsList').innerHTML = recs.map(r => `
${r.text}
${r.details}
${r.status}
`).join(''); document.getElementById('resultsArea').style.display = 'block'; }